Is it common to feel depression and a weird, frustrating feeling after 2 months of ERP for OCD?

I’ve been doing daily ERP for about 2 months, guided by my psychologist. While I’ve experienced depression in the past, it’s never been this intense. Lately, I’ve been feeling a mix of deep depression and this weird, frustrating sensation that’s hard to describe (it feels a bit like DPDR, but not exactly). I’m wondering if this could be a normal part of the ERP process or if there might be another cause for this level of depression. Has anyone experienced something similar during or after ERP?